The oppidum of the
Allobroges became a Roman colony about 47 BCE under Julius Caesar, but the
Allobroges managed to expel them; the exiles then founded the colony of Lugdunum (today's Lyon). Herod
Archelaus was exiled here in 6 CE. During the early Empire, Vienna (as the
Romans called it—not to be confused with today's Vienna) regained all its
former privileges as a Roman colony. In 257 Postumus was proclaimed emperor
here of a short-lived Gallo-Roman empire with its capital at Trier. Later it
became a provincial capital
